fv430 rectifier repairs

[terryb]

is there a manual anywhere for the testing and repair of the oil tank mounted rectifier unit?

[fv1609]

There is a little bit of coverage of Rectifier Unit No.1 Mk 1 here:

file:///C:/Users/Admin/AppData/Local/Temp/59e870de909ac_ALLCHARGEDUPPart2.pdf

I'll see what the EMER POWER has to offer:

W 124/2 Rectifier Unit, No 1 Mk 1 FV342588, Field & Base Repairs. Jun.1978
W 128/2 Rectifier Unit, No 1 Mk 1 FV342588.Part 2. Inspection Standard. Aug.1976

[terryb]

thanks Clive. 

that link wouldnt connect.

regards

tery

[fv1609]

Try this & go to Part2 pdf

 

[terryb]

good article, explains how the system works. I was getting very high resistances both forward and backward over all 6 power diodes, and no charge or ammeter reading although the gen light was clicking out. Found the busbar connection on the dc positive to the smaller plate type secondary choke to be very loose. Now I have forward resistance  og 180 ohm on all six power diodes (measured across AC1 AC2 AC3 DC+ DC-)

hopefully this value is correct!

thanks Clive

[fv1609]

I've got a series of resistance readings for the various connector pins. I'll try  scan them up tonight.

[terryb]

thank you

 

[fv1609]

Your forward resistances seem a bit high Terry are you using a digital multimeter?

If so there won't be enough voltage applied to drive the diode into forward conduction, best to use an analogue meter that can do this. I use an Avo 12 which is low ohms/volt & intended for automotive testing. I see in this EMER the meter specified is a CT 497 but this is just a panclimatic AVO 7.